CN113603386A - Low-density alkali slag cement foam concrete chemical foaming agent and preparation method thereof - Google Patents

Low-density alkali slag cement foam concrete chemical foaming agent and preparation method thereof Download PDF

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Publication number
CN113603386A
CN113603386A CN202110975239.0A CN202110975239A CN113603386A CN 113603386 A CN113603386 A CN 113603386A CN 202110975239 A CN202110975239 A CN 202110975239A CN 113603386 A CN113603386 A CN 113603386A
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water
slag cement
foaming agent
alkali slag
foam concrete
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Inventor
张智强
余林文
唐静
陈飞屹
李建林
叶建雄
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Chongqing University
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Chongqing University
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

In order to solve the problem that no effective alkali slag cement foam concrete preparation method exists in the prior art, the invention provides a low-density alkali slag cement foam concrete chemical foaming agent and a preparation method thereof, wherein the low-density alkali slag cement foam concrete chemical foaming agent comprises a foaming agent, a surfactant, a foam stabilizer and an exciting agent; wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate; the foam stabilizer is tea saponin; the excitant is sodium hydroxide-water glass solution; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution. The invention has the beneficial technical effects that the advantages of alkali slag cement and the advantages of foam concrete are organically combined together, and the characteristics of environmental protection, energy conservation, greenness and high efficiency are fully displayed.

Description

Low-density alkali slag cement foam concrete chemical foaming agent and preparation method thereof
Technical Field
The invention relates to a production and manufacturing technology of building materials, in particular to a low-density alkali slag cement foam concrete chemical foaming agent and a preparation method thereof.
Background
Foam concrete is a porous building material, has excellent properties of light weight, heat preservation, heat insulation, sound insulation, fire resistance, shock absorption and the like due to the structural characteristics, and is widely applied to the field of building engineering. The common foam concrete takes portland cement as a cementing material and adopts a physical foaming method or a chemical foaming method to prepare the foam concrete. The physical foaming method is a method in which air is mixed into a slurry by a physical method (high-speed stirring method and compressed air) to generate bubbles in the slurry, thereby obtaining a foamed concrete. The chemical foaming method is that foaming agent is utilized to directly generate chemical reaction in slurry to generate bubbles, and the slurry wraps the bubbles to obtain foam concrete with porous inner parts.
The invention patent with the patent number ZL201510777068.5 discloses a foam concrete foaming agent and application thereof, wherein sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and triterpenoid saponin are uniformly mixed according to a formula proportion and dissolved in water with the mass ratio of 1: 25-30 by stirring to form initial solution of the foaming agent; uniformly dispersing a foam stabilizer into the foaming agent solution while stirring, and stirring at a high speed to form a foam concrete foaming agent solution with a certain viscosity; foaming the foaming agent solution by adopting a special foaming machine, namely pouring the foaming agent solution into a stirring kettle, and continuously blowing air while stirring to prepare foam; measuring the foam properties such as foam stability, foam size and the like; mixing the qualified foam into the cement slurry, and adding aluminum powder with the mixing ratio and dosage into the slurry; and pouring the uniformly mixed foam concrete slurry into a grinding tool, and carrying out steam curing to obtain the foam concrete. Obviously, the invention patent adopts a physical foaming technology to prepare the foam concrete, and the foaming agent is mainly used for supplementing the early foam and further ensuring the product quality of the foam concrete.
The alkali slag cement is a novel building material which takes an alkali metal compound and ground water-quenched blast furnace slag as main components, compared with common ordinary portland cement, the alkali slag cement has the characteristics of quick setting and hardening, high early strength, lower hydration heat, low carbon, environmental protection and low energy consumption, and is known as one of novel cementing materials with the most development potential in the future. Obviously, the alkali slag cement is adopted to prepare the foam concrete, so that the advantages of the alkali slag cement are fully exerted, and the advantages of the foam concrete can be combined.
However, there is currently no effective method for producing an alkali slag cement foamed concrete.
Disclosure of Invention
In order to solve the problem that no effective alkali slag cement foam concrete preparation method exists in the prior art, the invention provides a low-density alkali slag cement foam concrete chemical foaming agent and a preparation method thereof.
The low-density alkali slag cement foam concrete chemical foaming agent comprises a foaming agent, a surfactant, a foam stabilizer and an exciting agent; wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate; the foam stabilizer is tea saponin; the excitant is sodium hydroxide-water glass solution; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution.
Further, the mass percent of the water-based calcium stearate is 45-55%.
Furthermore, the mass fraction of the triterpenoid saponin in the tea saponin is 55-65%.
Further, the modulus of the sodium hydroxide-water glass solution is 1.1-1.3; the modulus is SiO in solution2And Na2Molar ratio of O.
The invention relates to a preparation method of low-density alkali slag cement foam concrete, which adopts alkali slag cement as a gelling agent and aluminum powder as a foaming agent, wherein the granularity of the alkali slag cement foam concrete is 1200-1300 meshes; adopting water-based calcium stearate as a surfactant; tea saponin is adopted as a foam stabilizer; sodium hydroxide-water glass solution is used as an excitant; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution.
Further, the mass percent of the water-based calcium stearate is 45-55%.
Furthermore, the mass fraction of the triterpenoid saponin in the tea saponin is 55-65%.
Further, the modulus of the sodium hydroxide-water glass solution is 1.1-1.3; the modulus is SiO in solution2And Na2Molar ratio of O.
Further, when preparing the low-density alkali slag cement foam concrete, mixing the aluminum powder with water-based calcium stearate and water to prepare a foaming agent suspension, and then adding the foaming agent suspension into the alkali slag cement slurry, wherein the foaming agent suspension comprises the following components in percentage by weight: 10-15 wt% of aluminum powder, 74-88 wt% of water and 3.0-12 wt% of water-based calcium stearate.
Further, the chemical foaming preparation method of the low-density alkali slag cement foam concrete comprises the following steps:
s1 preparation of foaming agent suspension
S11, preparing materials according to the proportion of 10-15 wt% of foaming agent, 74-88 wt% of water and 3.0-12 wt% of surfactant, wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate with the mass percentage of 45-55%;
s12, pouring water into a container provided with a stirrer, and dispersing aluminum powder into the water while stirring and continuously stirring;
s13, adding the water-based calcium stearate into the water-aluminum powder mixed solution under the stirring condition to form a water-aluminum powder-calcium stearate suspension, namely a foaming agent suspension;
s2, preparing sodium hydroxide-water glass solution
Adding sodium hydroxide into a water glass solution until the modulus is 1.1-1.3; stirring and uniformly mixing; the modulus is SiO in solution2And Na2The molar ratio of O;
s3, preparing alkali slag cement slurry
S31, pouring more than 90% of calculated amount of water into a cement mortar stirrer according to the weight ratio of the alkali slag cement, the water and the tea saponin of 100: 30-60: 0.06-0.16, and adding the calculated amount of alkali slag cement under the stirring condition;
s32, pouring the residual water in the calculated amount into a container, and adding the tea saponin in the calculated amount under the condition of stirring;
s33, adding the dissolved and uniformly mixed tea saponin solution into a cement mortar stirrer under the condition of stirring;
s34, continuously stirring to prepare slurry;
s4, adding sodium hydroxide-water glass solution
Adding the sodium hydroxide-water glass solution prepared in the step S2 according to 40-50% of the weight of the alkali slag cement, and continuously and rapidly stirring;
s5, adding a foaming agent suspension
Adding the foaming agent suspension prepared in the step S1 according to 20-25% of the weight of the alkali slag cement, and continuously and rapidly stirring for 10-20S to prepare alkali slag cement slurry;
and S6, pouring the alkali slag cement slurry into the mold, and curing after the slurry is fully foamed in the mold.
The chemical foaming agent for the low-density alkali slag cement foam concrete and the preparation method have the beneficial technical effects that the advantages of the alkali slag cement and the advantages of the foam concrete are organically combined together, and the characteristics of environmental protection, energy conservation, greenness and high efficiency are fully displayed.
Drawings
FIG. 1 is a schematic diagram showing the steps of the chemical foaming method for preparing low-density alkali slag cement foam concrete according to the present invention.
The chemical foaming agent for low-density alkali slag cement foam concrete and the preparation method thereof according to the present invention will be further described with reference to the accompanying drawings and the following detailed description.
Detailed Description
The idea and technical method of the present invention will be fully described with reference to the embodiments, and the purpose and effect of the present invention will be fully understood. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and other embodiments obtained by those skilled in the art without inventive labor are within the scope of the present invention.
The low-density alkali slag cement foam concrete chemical foaming agent comprises a foaming agent, a surfactant, a foam stabilizer and an exciting agent; wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate; the foam stabilizer is tea saponin; the excitant is sodium hydroxide-water glass solution; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution. The invention relates to a low-density alkali slag cement foam concrete chemical foaming agent, which takes aluminum powder as the foaming agent, and the main chemical reaction is the reaction of aluminum and alkali, namely:
2Al+2OH-+2Na++6H2O＝2NaAl(OH)4+3H2↑
obviously, the main sources of alkali are alkali slag cement and sodium hydroxide-water glass solution added, and one of the reaction additives is derived from cement slurry, so that air bubbles generated by the reaction are easily wrapped by the slurry, and the foamed concrete is formed better and faster.
Preferably, the surfactant is water-based calcium stearate with the mass percentage of 45-55%; the foam stabilizer is tea saponin, wherein the mass fraction of triterpenoid saponin in the tea saponin is 55-65%.
In order to better excite the hydration activity of the alkali slag cement and effectively promote the reaction of the aluminum powder and the alkali, a sodium hydroxide-water glass solution is used as an exciting agent, and the modulus is adjusted to 1.1 to 1.3; the modulus is SiO in solution2And Na2Molar ratio of O.
The invention relates to a preparation method of low-density alkali slag cement foam concrete, which adopts alkali slag cement as a gelling agent and aluminum powder as a foaming agent, wherein the granularity of the alkali slag cement foam concrete is 1200-1300 meshes; adopting water-based calcium stearate as a surfactant; tea saponin is adopted as a foam stabilizer; sodium hydroxide-water glass solution is used as an excitant; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution.
Also, preferably, the surfactant is water-based calcium stearate with the mass percentage of 45-55%; the foam stabilizer is tea saponin, wherein the mass fraction of triterpenoid saponin in the tea saponin is 55-65%.
In order to better excite the hydration activity of the alkali slag cement and effectively promote the reaction of the aluminum powder and the alkali, a sodium hydroxide-water glass solution is used as an exciting agent, and the modulus is adjusted to 1.1-1.3; the modulus is SiO in solution2And Na2Molar ratio of O.
In order to ensure that aluminum powder can be uniformly dispersed into the slurry and further improve the foaming efficiency of the foaming agent aluminum powder, when preparing the low-density alkali slag cement foam concrete, the aluminum powder, water-based calcium stearate and water are mixed to prepare a foaming agent suspension, and then the foaming agent suspension is added into the alkali slag cement slurry, wherein the foaming agent suspension comprises the following components in percentage by weight: 10-15 wt% of aluminum powder, 74-88 wt% of water and 3.0-12 wt% of water-based calcium stearate.
FIG. 1 is a schematic view showing the steps of the chemical foaming method for preparing low-density alkali-slag cement foamed concrete according to the present invention, and it can be seen that the chemical foaming method for preparing low-density alkali-slag cement foamed concrete comprises the following steps:
s1 preparation of foaming agent suspension
S11, preparing materials according to the proportion of 10-15 wt% of foaming agent, 74-88 wt% of water and 3.0-12 wt% of surfactant, wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate with the mass percentage of 45-55%;
s12, pouring water into a container provided with a stirrer, and dispersing aluminum powder into the water while stirring and continuously stirring;
s13, adding the water-based calcium stearate into the water-aluminum powder mixed solution under the stirring condition to form a water-aluminum powder-calcium stearate suspension, namely a foaming agent suspension;
s2, preparing sodium hydroxide-water glass solution
Adding sodium hydroxide into a water glass solution until the modulus is 1.1-1.3; stirring and uniformly mixing; the modulus is SiO in solution2And Na2The molar ratio of O;
s3, preparing alkali slag cement slurry
S31, pouring more than 90% of calculated amount of water into a cement mortar stirrer according to the weight ratio of the alkali slag cement, the water and the tea saponin of 100: 30-60: 0.06-0.16, and adding the calculated amount of alkali slag cement under the stirring condition;
s32, pouring the residual water in the calculated amount into a container, and adding the tea saponin in the calculated amount under the condition of stirring;
s33, adding the dissolved and uniformly mixed tea saponin solution into a cement mortar stirrer under the condition of stirring;
s34, continuously stirring to prepare slurry;
s4, adding sodium hydroxide-water glass solution
Adding the sodium hydroxide-water glass solution prepared in the step S2 according to 40-50% of the weight of the alkali slag cement, and continuously and rapidly stirring;
s5, adding a foaming agent suspension
Adding the foaming agent suspension prepared in the step S1 according to 20-25% of the weight of the alkali slag cement, and continuously and rapidly stirring for 10-20S to prepare alkali slag cement slurry;
and S6, pouring the alkali slag cement slurry into the mold, and curing after the slurry is fully foamed in the mold.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Example 1:
a chemical foaming preparation method of low-density alkali slag cement foam concrete comprises the following steps:
s1 preparation of foaming agent suspension
S11, preparing materials according to the proportion of 11.5 wt% of aluminum powder, 85.3 wt% of water and 3.2 wt% of water-based calcium stearate, wherein the particle size of the aluminum powder is 1200-1300 meshes, and the mass percentage of the water-based calcium stearate is 45-55%;
s12, pouring the calculated amount of water into a container provided with a stirrer, and dispersing the calculated amount of aluminum powder into the water while stirring and continuously stirring;
s13, adding a calculated amount of water-based calcium stearate into the water-aluminum powder mixed solution under the stirring condition to form a water-aluminum powder-calcium stearate suspension, namely a foaming agent suspension;
s2, preparing sodium hydroxide-water glass solution
Adding sodium hydroxide into a water glass solution until the modulus is 1.1-1.3; stirring and uniformly mixing; the modulus is SiO in solution2And Na2The molar ratio of O;
s3, preparing alkali slag cement slurry
S31, preparing materials according to the proportion of 100 g of alkali slag cement, 50 g of water and 0.062 g of tea saponin, and pouring 47 g of water into a mud mixer; after the foaming agent suspension is added into the cement slurry in the step 5, the water-cement ratio in the system is 0.55, wherein the water-cement ratio refers to the ratio of water consumption per cubic meter of concrete to the use amount of all cementing materials, namely the weight ratio of water to alkali slag cement;
s32, pouring the residual water in the calculated amount into a container, and adding the tea saponin in the calculated amount under the condition of stirring;
s33, adding the dissolved and uniformly mixed tea saponin solution into a cement mortar stirrer under the condition of stirring;
s34, continuously stirring to prepare slurry;
s4, adding sodium hydroxide-water glass solution
Adding the sodium hydroxide-water glass solution prepared in the step S2 according to 40-50% of the weight of the alkali slag cement, and continuously and rapidly stirring; the specific addition amount is based on that the alkali equivalent in the system is 7 percent; the alkali content is the percentage content of alkali substances in the cement, and the alkali substances are Na2O is expressed in total equivalent;
s5, adding a foaming agent suspension
Adding 20% of the foaming agent suspension prepared in the step S1 by weight of alkali slag cement, and continuously and rapidly stirring for 10-20S to prepare alkali slag cement slurry;
and S6, pouring the alkali slag cement slurry into the mold, and curing after the slurry is fully foamed in the mold.
Examples 2 and 3
The other steps of examples 2 and 3 are the same as in example 1, except that the amount of blowing agent aluminum powder is increased during the compounding of the blowing agent suspension in step S1 so that the actual amount of aluminum powder added after the blowing agent suspension is added in step S5 is 2.83 g and 3.39 g, respectively.
Examples 4, 5 and 6
Examples 4, 5 and 6 were otherwise identical to example 1, except that the amount of aqueous calcium stearate surfactant was increased during compounding of the blowing agent suspension in step S1 so that the actual amount of aqueous calcium stearate added was 0.96 grams after the blowing agent suspension was added in step S5; meanwhile, the addition of tea saponin was adjusted to 0.073 g, 0.102 g and 0.124 g in the step of S31, respectively.
Examples 7, 8 and 9
The other steps of examples 7, 8 and 9 are the same as in example 1, except that the amount of the surfactant aqueous calcium stearate added is increased during the compounding of the foaming agent suspension in step S1 so that the actual amount of the aqueous calcium stearate added is 1.98 g after the foaming agent suspension is added in step S5; meanwhile, the addition of tea saponin was adjusted to 0.102 g, 0.130 g and 0.145 g, respectively, in the step of S31.
The data and test results of examples 1-9 are shown in Table 1.
Attached table 1: correlation data and detection results of various embodiments
Figure BDA0003227410020000071
Description of the drawings:
the water-cement ratio in the table refers to the ratio of water consumption per cubic meter of concrete to the amount of all cement materials. The invention adopts alkali slag cement as a cementing material, namely the ratio of the water consumption per cubic meter of concrete to the alkali slag cement.
The alkali content in the table refers to the content of alkali substances in the cement, and Na is used2And expressing the total equivalent of O. In the present invention, k% ═ m (Na)2O)/m (alkali slag). times.100%.
As can be seen from the attached table 1,
(1) the addition amount of the foaming agent aluminum powder can meet the requirement that the concrete density is less than 250kg/m within a wide range (2.26-3.39 g/100 g alkali slag cement)3The requirements of (1);
(2) the concrete density can meet the requirement that the concrete density is less than 250kg/m when the content of the tea saponin is lower (0.062 g/100 g alkali slag cement)3The requirements of (1);
(3) the water-based calcium stearate can meet the requirement that the concrete density is less than 250kg/m at lower content (0.63 g/100 g alkali slag cement)3The requirements of (1).
Obviously, the chemical foaming agent for low-density alkali slag cement foam concrete and the preparation method have the beneficial technical effects that the advantages of alkali slag cement and the advantages of foam concrete are organically combined together, and the characteristics of environmental protection, energy conservation, greenness and high efficiency are fully displayed.

Claims (10)

1. The chemical foaming agent for the low-density alkali slag cement foam concrete is characterized by comprising a foaming agent, a surfactant, a foam stabilizer and an exciting agent; wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate; the foam stabilizer is tea saponin; the excitant is sodium hydroxide-water glass solution; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution.
2. The chemical foaming agent for low-density alkali slag cement foam concrete according to claim 1, wherein the mass percentage of the aqueous calcium stearate is 45 to 55%.
3. The chemical foaming agent for low-density alkali slag cement foam concrete as claimed in claim 1, wherein the mass fraction of triterpenoid saponin in the tea saponin is 55-65%.
4. The chemical foaming agent for low-density alkali slag cement foam concrete according to claim 1, wherein the sodium hydroxide-water glass solution has a modulus of 1.1 to 1.3; the modulus is SiO in solution2And Na2Molar ratio of O.
5. A preparation method of low-density alkali slag cement foam concrete is characterized in that alkali slag cement is adopted as a gelling agent, aluminum powder is adopted as a foaming agent, and the granularity of the foam concrete is 1200-1300 meshes; adopting water-based calcium stearate as a surfactant; tea saponin is adopted as a foam stabilizer; sodium hydroxide-water glass solution is used as an excitant; calculated by adopting 100 g of alkali slag cement to prepare the foam concrete, the use amount of each component is as follows: 2.0-3.5 g of aluminum powder, 0.60-2.10 g of water-based calcium stearate, 0.06-0.16 g of tea saponin and 40-50 g of sodium hydroxide-water glass solution.
6. The method for preparing low-density alkali slag cement foamed concrete according to claim 5, wherein the mass percent of the water-based calcium stearate is 45-55%.
7. The method for preparing low-density alkali slag cement foam concrete according to claim 5, wherein the mass fraction of triterpenoid saponin in the tea saponin is 55-65%.
8. The method for preparing the low-density alkali slag cement foam concrete according to claim 5, wherein the modulus of the sodium hydroxide-water glass solution is 1.1-1.3; the modulus is SiO in solution2And Na2Molar ratio of O.
9. The method for preparing low-density alkali slag cement foam concrete according to claim 5, wherein, in the preparation of the low-density alkali slag cement foam concrete, the aluminum powder, the water-based calcium stearate and the water are mixed to prepare a foaming agent suspension, and then the foaming agent suspension is added into the alkali slag cement slurry, wherein the foaming agent suspension comprises the following components in percentage by weight: 10-15 wt% of aluminum powder, 74-88 wt% of water and 3.0-12 wt% of water-based calcium stearate.
10. The method for preparing a low density alkali slag cement foamed concrete according to claim 5, wherein the method comprises the following steps:
s1 preparation of foaming agent suspension
S11, preparing materials according to the proportion of 10-15 wt% of foaming agent, 74-88 wt% of water and 3.0-12 wt% of surfactant, wherein the foaming agent is aluminum powder, and the granularity of the foaming agent is 1200-1300 meshes; the surfactant is water-based calcium stearate with the mass percentage of 45-55%;
s12, pouring water into a container provided with a stirrer, and dispersing aluminum powder into the water while stirring and continuously stirring;
s13, adding the water-based calcium stearate into the water-aluminum powder mixed solution under the stirring condition to form a water-aluminum powder-calcium stearate suspension, namely a foaming agent suspension;
s2, preparing sodium hydroxide-water glass solution
Adding sodium hydroxide into a water glass solution until the modulus is 1.1-1.3; stirring and uniformly mixing; the modulus is SiO in solution2And Na2The molar ratio of O;
s3, preparing alkali slag cement slurry
S31, pouring more than 90% of calculated amount of water into a cement mortar stirrer according to the weight ratio of the alkali slag cement, the water and the tea saponin of 100: 30-60: 0.06-0.16, and adding the calculated amount of alkali slag cement under the stirring condition;
s32, pouring the residual water in the calculated amount into a container, and adding the tea saponin in the calculated amount under the condition of stirring;
s33, adding the dissolved and uniformly mixed tea saponin solution into a cement mortar stirrer under the condition of stirring;
s34, continuously stirring to prepare slurry;
s4, adding sodium hydroxide-water glass solution
Adding the sodium hydroxide-water glass solution prepared in the step S2 according to 40-50% of the weight of the alkali slag cement, and continuously and rapidly stirring;
s5, adding a foaming agent suspension
Adding the foaming agent suspension prepared in the step S1 according to 20-25% of the weight of the alkali slag cement, and continuously and rapidly stirring for 10-20S to prepare alkali slag cement slurry;
and S6, pouring the alkali slag cement slurry into the mold, and curing after the slurry is fully foamed in the mold.
CN202110975239.0A 2021-08-24 2021-08-24 Low-density alkali slag cement foam concrete chemical foaming agent and preparation method thereof Pending CN113603386A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102731048A (en) * 2012-06-29 2012-10-17 王建国 Alkali activated slag foamed cement product and its preparation method
CN104193274A (en) * 2014-08-28 2014-12-10 重庆大学 Alkali slag foamed concrete
CN105669236A (en) * 2014-11-19 2016-06-15 集佳绿色建筑科技有限公司 Alkali-activated slag foamed concrete material and preparation method thereof
CN106927770A (en) * 2017-04-12 2017-07-07 重庆大学 A kind of alkali-activated slag foamed concrete sound-absorbing material and preparation method thereof
CN112408927A (en) * 2020-11-26 2021-02-26 重庆大学 Chemically foamed low-density alkali slag foam concrete and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102731048A (en) * 2012-06-29 2012-10-17 王建国 Alkali activated slag foamed cement product and its preparation method
CN104193274A (en) * 2014-08-28 2014-12-10 重庆大学 Alkali slag foamed concrete
CN105669236A (en) * 2014-11-19 2016-06-15 集佳绿色建筑科技有限公司 Alkali-activated slag foamed concrete material and preparation method thereof
CN106927770A (en) * 2017-04-12 2017-07-07 重庆大学 A kind of alkali-activated slag foamed concrete sound-absorbing material and preparation method thereof
CN112408927A (en) * 2020-11-26 2021-02-26 重庆大学 Chemically foamed low-density alkali slag foam concrete and preparation method thereof

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